<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>爱学习</title>
    <link rel="stylesheet" href="css/reset.css">
    <link rel="stylesheet" href="css/style.css">
    <style>
        a:visited {
            color: red;
        }

        p::selection {
            background: pink;
        }

        p::first-letter{
            font-size: 50px;
        }

        p::first-line{
            background: yellowgreen;
        }
    </style>
</head>
<body>
<p>我是p标签</p>
<!--    <p style="color: red">我是p标签</p>-->
<!--    <p class="t1">我是p标签</p>-->
<hr>
<a href="http://www.baidu.com">访问过</a>
<a href="http://www.google.com">未访问过</a>
<a href="http://www.google1.com">未访问过</a>
<p>CSS Pseudo-elements Reference CSS Pseudo-elemaaents Reference CSS Pseudo-elements Reference CSS Pseudo-elements Reference CSS Pseudo-elements Reference CSS Pseudo-elemaaents Reference CSS Pseudo-elements Reference CSS Pseudo-elements ReferenceCSS Pseudo-elements Reference CSS Pseudo-elemaaents Reference CSS Pseudo-elements Reference CSS Pseudo-elements ReferenceCSS Pseudo-elements Reference CSS Pseudo-elemaaents Reference CSS Pseudo-elements Reference CSS Pseudo-elements ReferenceCSS Pseudo-elements Reference CSS Pseudo-elemaaents Reference CSS Pseudo-elements Reference CSS Pseudo-elements ReferenceCSS Pseudo-elements Reference CSS Pseudo-elemaaents Reference CSS Pseudo-elements Reference CSS Pseudo-elements Reference
    CSS Pseudo-elements Reference CSS Pseudo-elemaaents Reference CSS Pseudo-elements Reference CSS Pseudo-elements ReferenceCSS Pseudo-elements Reference CSS Pseudo-elemaaents Reference CSS Pseudo-elements Reference CSS Pseudo-elements Reference
    CSS Pseudo-elements Reference CSS Pseudo-elemaaents Reference CSS Pseudo-elements Reference CSS Pseudo-elements Reference
    CSS Pseudo-elements Reference CSS Pseudo-elemaaents Reference CSS Pseudo-elements Reference CSS Pseudo-elements Reference
    CSS Pseudo-elements Reference CSS Pseudo-elemaaents Reference CSS Pseudo-elements Reference CSS Pseudo-elements Reference
    CSS Pseudo-elements Reference CSS Pseudo-elemaaents Reference CSS Pseudo-elements Reference CSS Pseudo-elements Reference
    CSS Pseudo-elements Reference CSS Pseudo-elemaaents Reference CSS Pseudo-elements Reference CSS Pseudo-elements Reference
    CSS Pseudo-elements Reference CSS Pseudo-elemaaents Reference CSS Pseudo-elements Reference CSS Pseudo-elements Reference
</p>
</body>
</html>